Lighthouse Park
Looks like to get to Lighthouse Park for climbing one can take Translink buses to Marine Drive and Beacon Lane in West Van, which is really close.
From UBC, take the 17 or 4 (or etc) downtown to Granville Stn. Then walk along Georgia (?) and catch the 250 Horseshoe Bay.
This looks like a 90 minute one-way trip from UBC; costs 3$. In June midweek, the 250 is running every 30 minutes in evening.